參數(shù)資料
型號: PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強(qiáng)綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 41/164頁
文件大?。?/td> 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 41
3.1.5
Message Structure
The messages to transfer configuration, status and control information between the host and ISAR are described in
detail in the next chapters. Depending on the kind of message, the structure and message length may be different.
All messages consist of:
Interrupt status byte (HIS or IIS)
Control register MSB (CTRL MSB)
Control register LSB (CTRL LSB)
For some messages a certain number of additional bytes must be written to/read from the mailbox:
1st Parameter
2nd Parameter
:
N-th Parameter
50h
58h
60h
61h
ISAR Interrupt Status (IIS)
Host Write
Host Read
Host Interrupt Status (HIS)
ISAR Control Register Low
Host Control Register Low
Host Control Register High
ISAR Control Register High
Address
AD0...AD7
HIA
IIA
48h
4Ah
4Ch
Mailbox read address
Mailbox read address
Mailbox write address
Mailbox write address
Mailbox I/O data
Mailbox I/O data
MSK
STA
Bit
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
75h
Interrupt Status Byte (HIS / IIS)
Control Register MSB (CTRL MSB)
Control Register LSB (CTRL LSB)
1st Parameter
2nd Parameter
N-th Parameter
Figure 19 Message transfer
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